Electrically-operated warp stop motion



Nov-27, 192s.

" J. REGAN ELECTRICALLY OPERATED WARP STOP MOTION I Filed Aug. 4, 1927 2 Sheets-She et l I mag k a/ lire/izar Nov. 27, 1928. 1,692,952

J. REGAN ELECTRICALLY OPERATED WARP STOP MOTION Filed Aug. 4, 1927 2 Sheets-Sheet 2 d 6 o0 W m g 3 ./J *W w w 5% typeshown in my Patented Nov. 27, 1928.

UNITED STAT JOI-IN BEGAN, OF NEW BE'DFORD, MAS

SACHUSETTS, ASSIGNOR TO CROMIETON' &

KNOWLES LOOM VTORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ELECTRIGALLY-OPERATED WARP STOP MOTION.

Application filed August 4,1927. Serial No 210 661.

vention to provide changes and improvements in the construction of the stop motion shown 111 my priorpatents, such changesbeing particularly designed to adapt the stop motion for use with electricity so that the stop motion may be utilized in weaving anytype of fabric.

With this general object portant feature of my invention relates to the provision of electrically actuated stopping mechanism in a stop motion of the general prior patent, permitting the use of the same drop wires-used on the mechanical motions shown in the previously mentioned patent. I

A further object is to provide means for agitating the drop wires in an electrical warp stop motion, by which action more effective engagement between a fallen drop wire and a contact bar may be obtained.

Another obj eet is to provide manual means for twisting a fallen drop wire to quickly indicate the position of the broken warp thread.

Other features of my invention relate to the provision of improved and simplified operating mechanism, to the more convenient provision for'adjustment of said mechanism, and to other arrangements and combinations of parts which will be-hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings in which 1. is a side elevation. of parts of a loom embodying my improvements; 1

Fig. 2 is a plan view of the mechanism shown in 1; I

Fig. 3 is an enlarged end elevation of the stop motion, looking in the direction of the arrow 3 in Fig. 2;

Fig. 4 is a partial sectional rear elevation, taken along the line 4-4 in .Fig. 3;

I Fig. 5 is a sectional end elevation, taken along the line 5 5 in Fig. 2; 1

Fig. 6 is view similar to Fig.

in view, an inn 3. but show ing the parts in a different position and partially, broken away to show the operation of the mechanism.

Fig. 7 is a detail sectional plan view, taken along the line 77 in Fig. 3; and c Fig. 8 is a detail sectional plan view, taken along the line 88 in Fig. 1.

Referring to the drawings, I have shown parts of a loom including aloom frame 10, a warp bean i 11, warp threads W, a lay 12, a filling fork 13, a filling fork slide 14, an actuator for the filling fork, a knock-off lever '16 engaged by the slide 14, and'a shipper handle 17 movable in a slotted bracket 18 having a shoulder 19; The lower end of the shipper handle 17 is made in the form of a bent spring secured to a bracket 20 and effective-to normally hold the shipper handle in the outer end of the slotted bracket 18. lVhen the handle is pulled up and seated against the shoulder 19, the loom will be operated until the handle is released, which event will occur if the slide 14 is moved forward by the actuator 15, swinging the knock-off lever 16 to dislodge the shipper handle 17 from the shoulder 19.

The actuator 15 is intermittently oscillated by a cam 22 on a cam shaft 23 mounted in suitable bearings on the loom frame 10. It will be understood that the shipper lever 17 is effective through connecting lever or link 24 to disconnect the driving mechanism when the lever moves to the outer end of'the bracket All of the parts thus far described are of the usual construction and in themselves form 1 no part of my present invention, which relates particularly to the warp stop motion for stopping the thread, by dislodging the shipper handle from its operative position.

My improved or brackets and 31 secured to the opposite sides of the loom frame by bolts 33" (Figs. 4 and 5) and notched or recessed to receive a separator bar 85 and guide bars36. The bars 35 and 36 collectively provide a supporting surface for the warp threads W, supporting the threads at points closely adjacent the drop wires D. The recesses for the bars 35 and 3 6 are'preferably formed as notchesin loom upon breakage of a warp stop motion comprises stands plates 38, secured to the stands or brackets and 31 by bolts or rivets 39.

The drop wires D are provided with openings having upward extensions 41 of restricted width. Agitating rods 42 (Figs. 2 and 5) extend through the openings 40 while the drop wires are in normal position, said rods being of non-circular cross section and of a width adapted to enter the narrow portion 41 of an opening 40 when a drop wire falls as indicated in Fig. 6.

The rods 42 are non-circular in cross section and extend through slotted bearings 43 retatable in the brackets 30 and 31. Arms 44 rigid with the bearings are provided with rollers 45 mounted on studs 46 in said arms.

The rolls 45 are positioned in cam slots'48 in a cam plate 49, vertically slidable in outwardly projecting flanged portions 50 (Fig. 7) of the stand or bracket 30.

The cam slots 48 are preferably formed with straight vertical upper and lower end portions and with inclined middle portions as clearly shown in Fig. 3. A portion 52 (Fig. 4) of the cam plate 49 is bent forward and provided with an opening to receive the upper end of a lifter rod 54, adj ustably secured to the portion 42 by upper and lower adjusting nuts 55;

At its lower end, the lifter rod 54 is positioned above a lever 57, pivoted at 58 on the loom frame 10 and having a roll 59 at its front endenga-ged by a cam 60 on the cam shaft'23. The engaging portion of the lever 57 is elongated and'sl-ightly inclined downwardly and forwardly when the lever is in its lower position. V

This construction permits the stop motion to be adjusted forward and rearward to a vcertain extent, without destroying the operative relation of the lifter rod '54 and the lever 57. The straight end portions of the cam slots 48 also permit a considerable variation in the amount of vertical movement of the cam plate 49, without changing the angular movement of the agitating rods 42.

Contact bars ,60 4 and 5) are secured to the opposite sides of a strip 61 of insulating material, which in turn is secured to the lower edge of the separator bar 35. The contact bars 60 are connected by a wire 62 (Fig. 1) to a battery B, which in turn is connected by a wire 63 to a magnet coil M, from which a wire 64 connects to an insulated spring 65 (Fig. 8), which engages the shipper lever 17 when the lever 17 is in operative position.

The. filling fork 18 has a forward extension I "67 provided with a head 68 of iron or steel adapted to be attracted by the magnet M. The shipper lever 17 is'in circuit through the "frame of the loom with the agitating bars 42 on which the drop wires are mounted.

.lVhena drop wire falls. as indicated in h Fig. 6, the narrow portion 41 of its opening will receive the associated agitating bar 42,

which will thereupon repeatedly swing or twist the fallen drop wire side wise as indicated in Fig. 6, pressing the same firmly against one of the contactbars 60. Even if the contact bar should be covered with lint, the repeated side-wise twisting motion of the drop wire will very quickly establish contact therewith.

Such contactof the fallen drop wire'establishes electrical connection betweenits agitating bar 42 and its contact bar 60, thus complet-ing the magnetic circuit and causing the magnet M to be energized. attracting the head 68 and preventing the filling fork from being raised by the filling as the lay 12Ico1nes forward. The actuator 15 will then engage the filling fork and move the slide 14 to throw off the shipper handle and stop the loom. As the shipper handle moves from the full line to the dotted line position in Fig. 8, it is disengaged from the spring 65, thus breaking the circuit and releasing the filling fork.

In the operation of a warp stop motion, particularly on line warps having "a large number of ends, it is frequently somewhat difiicult to locate the fallen drop wire or the broken warp thread. To remedy this difficulty, I have provided a bell crank 70-;(Fig. 6) pivoted at 71 on the bracket 30 and having a forked end 72 engaging the lifter rod 54 below the nut 55. forward from the bell crank 70 and is provided with a handle or loop 76 by which it may be conveniently operated. The link may be held in position by a clip 77 on the inside of the arch 78 forming a portion of the loom frame 10. i

The bell crank 70 is normally inoperative but may be moved by the link 75 to raise the cam plate 49, thus oscillating the bars 42 and giving aEtwist to a fallen drop wire which will be readily apparent tovthefweaver, by reason of the movement of adjacent drop wires caused by the twisting of thefallen drop wire. A very considerable amount of the weavers time may thus be saved by uick location of the broken warp threads.

Having thus described my invention and the details of construction thereof, a further description of the operation isnot believed to be necessary and the advantages thereof will be readily apparent. The use of electrical connections in the knock-off mechanism permits me to use very thin and light drop wires, which cause less wear on very light warp threads and which also permit a larger number of warp threads to the inch for each bank of drop wires. The provision of the agitating bars 42, in combination with the electrical knock-01f =mechanism, overcomes the difficulty heretofore experienced by clogging of thecontacts with lint, as the agitating bars cause a fallen drop A rod or link 75 extends Q wire to wipe repeatedly over the contact T roe stopped. Furthermore, the provision of means for manual oscillation of the bars 42 enables the weaver to Very quickly locate the fallen drop wire andthe broken warp thread associated therewith.

laying thus described my invention .and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is:

1. In a warp stop motion, a plurality of drop wires, a fixed electric contact bar positioned to be engaged by a fallen drop'wire, and additional mechanical means effective to agitate a fallen drop Wire to force said wire repeatedly against said fixed bar until electrical contact with said bar is effected.

2. In a warp stop motion, a plurality of drop wires, a fixed electrical contact bar positioned for engagement by a fallen drop wire, and additional mechanical means effective to repeatedly twist a fallen drop wire against said fixed contact bar until electrical contact therewith is effected.

3. In a warp stop motion for a textile machine, a plurality of drop wires, a fixed electrical contact bar positioned for engagement by a fallen drop wire and additional mechanical means -to agitate a fallen wireand repeatedly force said wire against said fixed bar until contact is completed and the machine is stopped, said additional means being thereafter manually operable to twist a fallen drop wire to indicate the posit-ion of a broken warp thread.

l. In a warp stop motion, a plurality of drop wires having openings therein restricted in width in their upper end port-ions, noncircular bars extending through said openings, arms on said bars, and a vertically movable actuating plate having cam slots engaging said arms and providing limited rocking motion therefor. p

5. In a warp stop motion, a plurality of drop wires having openings therein re stricted in width in their upper end portions, non-circular bars extending through said openings, arms on said bars, and a vertically movable actuating plate having cam slots engaging said arms and providing limited rocking motion therefor, said cam slots having dwell portions at the upper and lower ends thereof.

6. In a warp stop motion, plurality of drop wires having openings therein restricted in width in. their upper ends portions, non-circular bars extending through said openings, arms on said bars, a vertically movable actuating plate having cam slots engaging said arms andproviding limited rocking motion therefor, and additional means to raise said cam plate manually.

7. In a warp stopv motion, a plurality of drop wires having openings therein restricted in width in their upper end portions, noncircular bars extending through said openings, arms on said bars, a vertically movable actuating plate having cam slots engaging said arms and providing limited rocking mo-V tron therefor, and means to 11ft said cam plate, said lifting means permitting adjust ment of said stop motion forward and rearward in the loom and being effective to actuate said cam plate in all adjusted positions of said stop motion.

8. In a warp stop motion, a plurality of drop wires having slots therein with restricted portions, a fixed electric contact member located atoneside of a fallen drop wire, noncircular rods extending through the slots of the drop wires, the restricted part of the slot of a fallen drop wire being effective to engage the rod to cause said wire and rod to move together, and means to oscillate said rod to cause a fallen drop wire to move side wise into electrical fixed contact with the contact member.

9. In a warp stop motion, a plurality of drop wires, a fixed contact bar located at one side of a fallen drop wire, and mechanical means to positively move a fallen drop Wire repeatedly into electrical contact with said fixed contact bar until the loom is stopped.

fixed my signature.

In testimony whereof I have hereunto af- I JOHN REGAN. 

